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Discuss Lighting with key switch in the Electrical Wiring, Theories and Regulations area at ElectrciansForums.co.uk.

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  1. Craig Boyd
    Offline

    Craig Boyd New EF Member

    Location:
    Dalton
    Business Name:
    Cab electrical
    I've just been asked to install a lighting circuit in singles in round plastic conduit but also have a grid switch with an emergency key switch to an emergency light. Trouble is and I know some of you may be thinking how is he even qualified but I've never used singles. Ive been a house basher all my time Is it possible someone could give me a step by step?? Do you take the feed to the em light then to other lights and have seperate switches? Be nice please guys
     
  2. Spoon
    Offline

    Spoon Trusted Advisor

    Location:
    Lancashire
    Have you tried searching for forum for info?
    It's frowned upon to give 'step by step' advice on here.
    Do a search and come back and tell us how you think you should do it. This will give you knowledge and we can correct anything then or suggest better ways.
     
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  3. Pete999
    Online

    Pete999 Trusted Advisor

    Top Poster Of Month

    Location:
    Northampton
    Business Name:
    None
    What Spoon said
     
  4. telectrix
    Online

    telectrix Scouser and Proud of It Trusted Advisor

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    the advantage of using singles is that you can take L to switch and S/L to fittings, taking the N direct to the fittings. now work out what does what and come up with a sketch. we can then advise if it's OK or needs improvement.
     
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  5. Vortigern
    Offline

    Vortigern Electrician's Arms

    Location:
    England
    Business Name:
    F.H. Electrical
    Is this maintained or non-maintained?
     
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  6. Jim90
    Offline

    Jim90 Jim1990

    Location:
    Norwich
    From my experience it’s also got me in the client’s good books by wiring into the switch first and then into the key switch, so when the annual inspection/flick tests are done only the emergency lights are only affected. Otherwise the inspections will need to be done out of hours.
    Also if they are unspecified as maintained or non maintained, I think it’s best to future proof and wire as maintained at all emergency points just incase. Little expense at this stage! As for wiring the circuit, it’s simple stuff.
     
    • Agree Agree x 1
  7. davesparks
    Online

    davesparks Trusted Advisor

    Location:
    guildford
    Ask the person who did the emergency lighting design to confirm how they intended for it to be wired.
     
  8. davesparks
    Online

    davesparks Trusted Advisor

    Location:
    guildford
    The wiring should be carried out in accordance with current standards not just what gets you in the clients good books.
    Testing will probably need to be done out of hours regardless as you need to allow enough time for the batteries to fully charge before the building is occupied again. That is unless other arrangements are made to provide emergency lighting whilst the batteries are re-charging.
     
    • Informative Informative x 1
  9. I2C
    Offline

    I2C Electrician

    Location:
    East Sussex
    Completely agree. When using singles, the permanent-line usually goes directly to the switch rather than the light.
    In all honesty it doesn't strictly matter, the advantage of using singles is that your circuits can be shorter, by connecting from A-B directly instead of requiring additional planning to efficiently use cable.

    A very good point! While occupants are present, the emergency lighting must have enough charge to allow operation for a set amount of time, should such a scenario take place.

    My only other advice regarding singles is to ensure line and neutral run through the same orifice of a metallic enclosure to avoid eddy-currents.
     
  10. Pete999
    Online

    Pete999 Trusted Advisor

    Top Poster Of Month

    Location:
    Northampton
    Business Name:
    None
    They would have to if the lights were wired in conduit, you wouldn't normally use singles any other way, I did say NORMALLY
     
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